>>10904339As long as you do the usual water water wash for these types of kits any paint should do. I've used testors and tamiya paints on the ones I've worked on before.
As for gkm, I've been ordering stuff from them over the years without a problem although their website and ordering process is kinda weird. They make recasts only when they receive enough preorders but they also send the invoice right after you place your po, but you dont have to pay it right away. What drew me to them initially was that they were the only online seller that had these gaogaigar kits when I wanted to start getting into movable garage kits.